Yikes! I checked Bob's Red Mill and they are out too.
Was going to suggest the sourdough thing too. I used a "Herman" for a long time, a sweet dough starter. Here's the no yeast version of starter:
https://www.cooks.com/recipe/h90zw19...hip-bread.html
I baked weekly with my starter for a couple of years until we went low carb, I kept it in a heavy plastic ice cream container with a lid on top of my dishes in my cabinet year round. You do need to feed it and use it.
The plain Herman rolls and such are very much hot breads, they don't store well but they start getting fancy when you put in stuff like pudding mix! For recipes just search with the term Herman.